Synthesis and characterization of ce-doped Yl(YAG:Ce) nanopowders used for solid-state lighting

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Abstract

Nano-Ce-doped Yl(YAG:Ce) powders were synthesized by using a sol-gel low temperature combustion method, followed by thermal annealing. The annealing temperature for enriching nanoparticles was optimized and found to be 1000°C. The process for enriching uniform nanoparticles of YAG:Ce powder was carried out by using the nanosteam technique (NST). The nanoparticles obtained from this NST treatment had a size in the range of 9-20 nm. Measurements of the photoluminescence spectra of the dispersed YAG:Ce nanoparticles solutions showed a blue shift in the photoemission with a value of ca. 10 nm in the green region. WLEDs made from the blue LED chip coated with the nano-YAG:Ce + MEH-PPV composite epoxy exhibit white light with a broad band luminescent spectrum and a high color rending index (CRI). The photoluminescence spectra of the YAG:Ce nanoparticles showed a potential application of the prepared nanostructured YAG:Ce phosphor not only in energy-efficient solid-state lighting, but also in optoelectronic devices, including organic composite solar cells. In addition, it is suggested that NST can be applied for the enrichment of uniform inorganic nanoparticles. © 2014 Do Ngoc Chung et al.

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Chung, D. N., Hieu, D. N., Thao, T. T., Truong, V. V., & Dinh, N. N. (2014). Synthesis and characterization of ce-doped Yl(YAG:Ce) nanopowders used for solid-state lighting. Journal of Nanomaterials, 2014. https://doi.org/10.1155/2014/571920

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